Machine for cutting stereotype-plates.



No. $94,297. Patented Feb. 25, |902.

W. F. NISBETT P. ANDREWS. MACHINE FR CUTTING STERETYPE PLATES. (Appucatimi med ma n '19cm (No M o d e l 2 S h e e t s S h e e t v 2.

q l..." :annuall If Il i l nu' umm UNITED STATES ATENT EFICE.

VILLIAM I. NISBETT AND PETER ANDREWS, OF BIG RAPIDS, MICHIGAN.

MACHINE FOR CUTTING STEREOTYPE-PLATES.

SPECIFICATION forming part of Letters Patent No. 694,297, dated February 25, 1902.

Applioation iiled May 1l, 1901. Serial No. 59,850. (No model.)

T0 all whom, t may concern:

Beit known that we, WILLIAM P. NIsBET'r and PETER ANDREWS, citizens ot' the United States, residing at and Whose post-ofce address is Big Rapids, in the county of Mecosta and State of Michigan, have invented new and useful Improvements in Machines for Cutting Stereotype-Plates, of which'thefollowng is a specification. Y

Our invention relates to machines for cutting stereotype-plates; and its object is to provide a machine for the purpose named of simple, inexpensive, and durable construction, in which the use of springs is avoided and which may be readily adjusted and effectively operated by a single stroke of the cutter.

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawings, which form part of this specification.

In the drawings, Figure 1 is a View in perspective of a machine embodying' the invention. Fig. 2 is a vertical section of the same. Fig. 3 is a perspective view taken from the side of the machine opposite to that shown in Fig. 1, and Fig. 1i is a side elevation of the trimming-knife detached from the machine.

The reference-n u meral 1 designates the base of the machine, and 2 the side plate thereof, the latter extending upward from one side of the base and having an upwardly-projecting arm 3, which forms one side of the frame within which the knives operate. The opposite side et and top 5 of the knife-supporting frame'are preferably formed integral and of inverted-L shape -and secured to the base 1 and the side plate 2 by screws 6.

The inner sides of the arm 3 and side 4 of theframe are formed with vertical grooves, Within which is slidably supported acuttingblade 7, connected by means of a link 8 With the lower end of a lever 9, which extends through an elongated slot 10, formed in the top bar 5, and is fulcrumed on a cross-pin 11.

The upper end of the link 8 is pivotally secured to the lever, and said link is formed near its lower end with an elongated slot 12, into which extends a pin 13, projecting from one side of the cutter 7. The lower end 14: of the lever 9 is rounded to form a cam-face,

which bears against the top edge of the movable cutter, and the loose connection of the link and cutter permits the latter to be raised and lowered Within its guides, as illustrated by dotted lines in Fig. 2. The lever 9 is formed on opposite sides and above its fulcrum 11 with oppositely-beveled shoulders l5, supported on rounded bearings 5a, which serve as stops to limit the movement of the lever.

16 designates a knife supported upon the base l and adjustable vertically by means of set-screws 17.

Projecting from the side plate 2 is a bracket 1S, upon which is fulcrumed a lever 19, provided With a handle 2() and having welded thereto a steel plate 21, constituting a trimming-knife. The lever 19 extends through a slot 22, formed in the side plate. In connection with this trimming-knife we preferably employ a cam-lever 23, fulcrumed upon a bracket 24, projecting from the side plate 2. This cam-lever serves to irmly clamp the plate to be trimmed.

The peculiar angular shape of the trimmingknife, as shown in Fig. Ll, greatly facilitates the trimming of the plates.

The operation of the machine will be readily understood. The cutting-blade 7 is lowered by a single movement of the lever either toward or from the operator, and the knives employed insure a clean cut even between thinly-spaced lines.

As no springs are required to retract the cutting-plate, there is little liability of the machine getting out of order.

We claim- 1. A machine for cutting stereotype-plates comprising a base having a fixed side plate formed with an upwardly-projecting tongue and provided with a vertical groove, the detachable side having a top formed with a slot, and provided with a vertical groove, the fixed knife supported on the base, a movable cutting-blade having a pin, a link having a slot receiving the pin, and a lever extending through', and fulcrumed in, the slot of the top and connected with the link.

2. A machine for cutting stereotype-plates comprising a base having la fixed side plate formed with an upwardly-projecting tongue IOO 4and provided With a vertical groove, the detachable side having a top formed with a slot and provided with a vertical groove, the adjustable iXed knife supported on the base, a movable. cutting-blade having a pin, a link having a slot receiving the pin, and a lever extending through, and fulcrumed in, lthe slot of the top and connected with the link.

3. A machine for cutting stereotype-plates comprising a base having a fixed side plate formed with an upwardly-projecting tongue and provided with a vertical groove, the detachable side havinga top formed with rounded bearings and provided with a vertical groove, the fixed knife supported on the base, a movable cutting-blade having a pin, a link having a slot receiving the pin, and a lever fulcrumed to the top having a cam-face bearing on the movable cutting-blade, formed In testimony whereof We aliix our signatures in presence of two Witnesses.

WILLIAM P. NISBETT. PETER ANDREWS.

Witnesses:

FRANK E. MARKHAM, A. B. COGGER. 

